5D4 Sensor Defect Discovered
- Thread starter LSXPhotog
- Start date
So I got my replacement camera, still got the same problem. So the store staff told me that Canon (in Taiwan) didn't find it to be defect and claimed it to be a normal behavior. Which I personally don't (yet) believe it's a normal behavior.
Anyway, I am keeping mine for a few reasons..
1) If it is really a defect, Canon would normally issue a recall. I don't mind that my camera gets recalled later.
2) If it is fixable by firmware, then it's all good.
3) It's not often that I will be in a situation where I have to underexpose by many stops and then push it later. I will be in Kyoto later this week and will see my real life usage.
4) Even with this 'defect', it is still a much better camera than my 6D, the new AF system and all the featured Canon added to semi-pro body after 6D are really benefiting me right now.
Anyway, I am keeping mine for a few reasons..
1) If it is really a defect, Canon would normally issue a recall. I don't mind that my camera gets recalled later.
2) If it is fixable by firmware, then it's all good.
3) It's not often that I will be in a situation where I have to underexpose by many stops and then push it later. I will be in Kyoto later this week and will see my real life usage.
4) Even with this 'defect', it is still a much better camera than my 6D, the new AF system and all the featured Canon added to semi-pro body after 6D are really benefiting me right now.
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For comparision i have compare 5D2 vs 5D4.
If you see banding after +5ev in post i think it's normal because you can see some banding with 5D2 just+2ev.
But my 5D4 you can see banding in some underexposure image without increase exposure in post.
I agree that if you want to buy 5D4 you should wait if you can.
Crop 100% Noise reduction tab in Lightroom turn off.
Left side 5D2. Right side 5D4
Under 2 ev and +2 ev in post.
Under 3 ev and +3 ev in post.
Under 4 ev and +4 ev in post.
Under 5 ev and +5 ev in post.
If you see banding after +5ev in post i think it's normal because you can see some banding with 5D2 just+2ev.
But my 5D4 you can see banding in some underexposure image without increase exposure in post.
I agree that if you want to buy 5D4 you should wait if you can.
Crop 100% Noise reduction tab in Lightroom turn off.
Left side 5D2. Right side 5D4
Under 2 ev and +2 ev in post.
Under 3 ev and +3 ev in post.
Under 4 ev and +4 ev in post.
Under 5 ev and +5 ev in post.
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Anyone who has ever worked with studio audio recording knows that there is no such thing as "zero noise." What exists is a high signal-to-noise ratio. If you seek the highest possible noise rejection, measured in -dB, you will be able to "hide" the noise.
Therefore, any equipment that records audio or image, when amplified beyond a certain amount, will start to show noise.
The question is: Would this noise level be noticeable in normal use?
I'm sure someone could make the noise be noticeable by using the best equipment in the world if they use it the wrong way.
Therefore, any equipment that records audio or image, when amplified beyond a certain amount, will start to show noise.
The question is: Would this noise level be noticeable in normal use?
I'm sure someone could make the noise be noticeable by using the best equipment in the world if they use it the wrong way.
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L
Loswr
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lkunl said:
It's not terribly obvious, but it's also visible in the full (not cropped) image. To me, that certainly looks like a defective sensor. If/when you communicate with Canon (assuming you haven't, apologies if you stated you did and I missed it), I'd suggest processing the image with DPP to avoid them blaming Adobe.
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+1 That is sound advice. When I returned my 5D4 I included a usb stick with a copy of CR2 file and newest DPP software for them to test by themselves (OK that and free DNG converter too!). But I have a feeling that they just believed me (I had already emailed them screenshots) and the day they got it back proceeded to order a new one. That would be OK but they also said as soon as they get it they will send it to me which seems fine except from the fact I asked them to test it themselves in an attempt to avoid disappointment. Judging from this thread and Michaels's the Maven poll I am not sure the replacement 5D4 will be OK. I emailed them to remind them this but I didn't get any answer.neuroanatomist said:
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lkunl said:
Ok, so in another night scene, is this band in the same spot? or does the band move around on the sensor?
It is interesting, and it is definitely there... could be a flaw(?) or where the edges of the camera's abilities are.
I'll have to go play with my two tonight and see what I get with my non 5D4 cameras... just cause I've never really shot like this.. I've pulled shadows quite a bit, and got noise grain, and horrible banding in some cases, and seems like I have had the purple band show up on my 50D and 7D2, but only under extreme lifting.. but I wasn't doing night shots where there is bright spots.
I suppose at a minimum, we shouldn't advise those who do night photography, and like to pull up exposures to go buy a 5DIV - there may be other cameras better suited.
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neuroanatomist said:
The banding appear on both DPP and Lightroom. It happen both vertical and horizontal composition at around same pixel. I test with night sky astro shot (at home after last trip) both normal and under exposure but still can not reproduce it. Maybe be it's because CMOS smearing same issue as C300 Mark II as JimGemini reply.
https://www.cinema5d.com/canon-c300-mark-ii-review-dynamic-range/
I already call Canon but they said i have to drop camera at them for checking.
I will travel soon. So, i dont have a time to send it to Canon yet.
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Here is a video comparing the C300 Mark II vs the Sony FS7 where the CMOS smearing issue is highlighted. This is exactly what is happening with my 5D4. The size of the banding and where it is located on the sensor varies depending on where in the image we have a strong highlight to shadow transition. Also able to replicate in DPP or Lightroom.
https://youtu.be/ffnGDxONrCg?t=584
https://youtu.be/ffnGDxONrCg?t=584
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Yuck, I never buy or like colored camera bodies as they start looking old in a very short time when the colored paint start fading or wearing off and the camera starts looking horrible and old.
Smart camera makers should just stick to the original black color.
Smart camera makers should just stick to the original black color.
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tron said:and the day they got it back proceeded to order a new one.
That would be OK but they also said as soon as they get it they will send it to me which seems fine except from the fact I asked them to test it themselves in an attempt to avoid disappointment. Judging from this thread and Michaels's the Maven poll I am not sure the replacement 5D4 will be OK. I emailed them to remind them this but I didn't get any answer.
I doubt you will get an answer because it was a silly request.
If they are sending you a new copy they are going to assume it is a good copy since the majority they send out do not get returned for service.
You received a bad copy and they send you a new copy. This is called good customer service. If they send you another copy that is bad and you return it for another that is great customer service, and poor quality control.
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takesome1 said:tron said:and the day they got it back proceeded to order a new one.
That would be OK but they also said as soon as they get it they will send it to me which seems fine except from the fact I asked them to test it themselves in an attempt to avoid disappointment. Judging from this thread and Michaels's the Maven poll I am not sure the replacement 5D4 will be OK. I emailed them to remind them this but I didn't get any answer.
I doubt you will get an answer because it was a silly request.
If they are sending you a new copy they are going to assume it is a good copy since the majority they send out do not get returned for service.
You received a bad copy and they send you a new copy. This is called good customer service. If they send you another copy that is bad and you return it for another that is great customer service, and poor quality control.
No, it is not a silly request. I would ask the same because I would be interested as to whether it was a faulty sensor in a particular camera or a limitation of the sensor design. I would also take it as a mark of them being interested in what is happening. You can argue that a retailer will not be interested in defining the issue but you lose nothing by asking.
If they send you a replacement and that shows the same characteristic it is pretty facile of you to conclude it was poor quality control just because it did not match your pre-conceptions. The only way you will know it was poor quality control is if you get a third camera and that performs as you expected.
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